Boost lexical_cast Performance

I just found this interesting: http://www.boost.org/doc/libs/1_52_0/doc/html/boost_lexical_cast/performance.html#boost_lexical_cast.performance.gnu_c___version_4_6_3

I wonder what happened to coerce_cast and I wonder why lexical_cast falls behind on floating point conversions... Aside from that, it makes sense to start trying to make lexical_cast a de facto in even the most basic of conversions.